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civil_time_test.cc
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civil_time_test.cc
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// Copyright 2018 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "absl/time/civil_time.h"
#include <limits>
#include <sstream>
#include <type_traits>
#include "absl/base/macros.h"
#include "gtest/gtest.h"
namespace {
TEST(CivilTime, DefaultConstruction) {
absl::CivilSecond ss;
EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(ss));
absl::CivilMinute mm;
EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(mm));
absl::CivilHour hh;
EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hh));
absl::CivilDay d;
EXPECT_EQ("1970-01-01", absl::FormatCivilTime(d));
absl::CivilMonth m;
EXPECT_EQ("1970-01", absl::FormatCivilTime(m));
absl::CivilYear y;
EXPECT_EQ("1970", absl::FormatCivilTime(y));
}
TEST(CivilTime, StructMember) {
struct S {
absl::CivilDay day;
};
S s = {};
EXPECT_EQ(absl::CivilDay{}, s.day);
}
TEST(CivilTime, FieldsConstruction) {
EXPECT_EQ("2015-01-02T03:04:05",
absl::FormatCivilTime(absl::CivilSecond(2015, 1, 2, 3, 4, 5)));
EXPECT_EQ("2015-01-02T03:04:00",
absl::FormatCivilTime(absl::CivilSecond(2015, 1, 2, 3, 4)));
EXPECT_EQ("2015-01-02T03:00:00",
absl::FormatCivilTime(absl::CivilSecond(2015, 1, 2, 3)));
EXPECT_EQ("2015-01-02T00:00:00",
absl::FormatCivilTime(absl::CivilSecond(2015, 1, 2)));
EXPECT_EQ("2015-01-01T00:00:00",
absl::FormatCivilTime(absl::CivilSecond(2015, 1)));
EXPECT_EQ("2015-01-01T00:00:00",
absl::FormatCivilTime(absl::CivilSecond(2015)));
EXPECT_EQ("2015-01-02T03:04",
absl::FormatCivilTime(absl::CivilMinute(2015, 1, 2, 3, 4, 5)));
EXPECT_EQ("2015-01-02T03:04",
absl::FormatCivilTime(absl::CivilMinute(2015, 1, 2, 3, 4)));
EXPECT_EQ("2015-01-02T03:00",
absl::FormatCivilTime(absl::CivilMinute(2015, 1, 2, 3)));
EXPECT_EQ("2015-01-02T00:00",
absl::FormatCivilTime(absl::CivilMinute(2015, 1, 2)));
EXPECT_EQ("2015-01-01T00:00",
absl::FormatCivilTime(absl::CivilMinute(2015, 1)));
EXPECT_EQ("2015-01-01T00:00",
absl::FormatCivilTime(absl::CivilMinute(2015)));
EXPECT_EQ("2015-01-02T03",
absl::FormatCivilTime(absl::CivilHour(2015, 1, 2, 3, 4, 5)));
EXPECT_EQ("2015-01-02T03",
absl::FormatCivilTime(absl::CivilHour(2015, 1, 2, 3, 4)));
EXPECT_EQ("2015-01-02T03",
absl::FormatCivilTime(absl::CivilHour(2015, 1, 2, 3)));
EXPECT_EQ("2015-01-02T00",
absl::FormatCivilTime(absl::CivilHour(2015, 1, 2)));
EXPECT_EQ("2015-01-01T00",
absl::FormatCivilTime(absl::CivilHour(2015, 1)));
EXPECT_EQ("2015-01-01T00",
absl::FormatCivilTime(absl::CivilHour(2015)));
EXPECT_EQ("2015-01-02",
absl::FormatCivilTime(absl::CivilDay(2015, 1, 2, 3, 4, 5)));
EXPECT_EQ("2015-01-02",
absl::FormatCivilTime(absl::CivilDay(2015, 1, 2, 3, 4)));
EXPECT_EQ("2015-01-02",
absl::FormatCivilTime(absl::CivilDay(2015, 1, 2, 3)));
EXPECT_EQ("2015-01-02",
absl::FormatCivilTime(absl::CivilDay(2015, 1, 2)));
EXPECT_EQ("2015-01-01",
absl::FormatCivilTime(absl::CivilDay(2015, 1)));
EXPECT_EQ("2015-01-01",
absl::FormatCivilTime(absl::CivilDay(2015)));
EXPECT_EQ("2015-01",
absl::FormatCivilTime(absl::CivilMonth(2015, 1, 2, 3, 4, 5)));
EXPECT_EQ("2015-01",
absl::FormatCivilTime(absl::CivilMonth(2015, 1, 2, 3, 4)));
EXPECT_EQ("2015-01",
absl::FormatCivilTime(absl::CivilMonth(2015, 1, 2, 3)));
EXPECT_EQ("2015-01",
absl::FormatCivilTime(absl::CivilMonth(2015, 1, 2)));
EXPECT_EQ("2015-01",
absl::FormatCivilTime(absl::CivilMonth(2015, 1)));
EXPECT_EQ("2015-01",
absl::FormatCivilTime(absl::CivilMonth(2015)));
EXPECT_EQ("2015",
absl::FormatCivilTime(absl::CivilYear(2015, 1, 2, 3, 4, 5)));
EXPECT_EQ("2015",
absl::FormatCivilTime(absl::CivilYear(2015, 1, 2, 3, 4)));
EXPECT_EQ("2015",
absl::FormatCivilTime(absl::CivilYear(2015, 1, 2, 3)));
EXPECT_EQ("2015",
absl::FormatCivilTime(absl::CivilYear(2015, 1, 2)));
EXPECT_EQ("2015",
absl::FormatCivilTime(absl::CivilYear(2015, 1)));
EXPECT_EQ("2015",
absl::FormatCivilTime(absl::CivilYear(2015)));
}
TEST(CivilTime, FieldsConstructionLimits) {
const int kIntMax = std::numeric_limits<int>::max();
EXPECT_EQ("2038-01-19T03:14:07",
absl::FormatCivilTime(absl::CivilSecond(
1970, 1, 1, 0, 0, kIntMax)));
EXPECT_EQ("6121-02-11T05:21:07",
absl::FormatCivilTime(absl::CivilSecond(
1970, 1, 1, 0, kIntMax, kIntMax)));
EXPECT_EQ("251104-11-20T12:21:07",
absl::FormatCivilTime(absl::CivilSecond(
1970, 1, 1, kIntMax, kIntMax, kIntMax)));
EXPECT_EQ("6130715-05-30T12:21:07",
absl::FormatCivilTime(absl::CivilSecond(
1970, 1, kIntMax, kIntMax, kIntMax, kIntMax)));
EXPECT_EQ("185087685-11-26T12:21:07",
absl::FormatCivilTime(absl::CivilSecond(
1970, kIntMax, kIntMax, kIntMax, kIntMax, kIntMax)));
const int kIntMin = std::numeric_limits<int>::min();
EXPECT_EQ("1901-12-13T20:45:52",
absl::FormatCivilTime(absl::CivilSecond(
1970, 1, 1, 0, 0, kIntMin)));
EXPECT_EQ("-2182-11-20T18:37:52",
absl::FormatCivilTime(absl::CivilSecond(
1970, 1, 1, 0, kIntMin, kIntMin)));
EXPECT_EQ("-247165-02-11T10:37:52",
absl::FormatCivilTime(absl::CivilSecond(
1970, 1, 1, kIntMin, kIntMin, kIntMin)));
EXPECT_EQ("-6126776-08-01T10:37:52",
absl::FormatCivilTime(absl::CivilSecond(
1970, 1, kIntMin, kIntMin, kIntMin, kIntMin)));
EXPECT_EQ("-185083747-10-31T10:37:52",
absl::FormatCivilTime(absl::CivilSecond(
1970, kIntMin, kIntMin, kIntMin, kIntMin, kIntMin)));
}
TEST(CivilTime, RangeLimits) {
const absl::civil_year_t kYearMax =
std::numeric_limits<absl::civil_year_t>::max();
EXPECT_EQ(absl::CivilYear(kYearMax),
absl::CivilYear::max());
EXPECT_EQ(absl::CivilMonth(kYearMax, 12),
absl::CivilMonth::max());
EXPECT_EQ(absl::CivilDay(kYearMax, 12, 31),
absl::CivilDay::max());
EXPECT_EQ(absl::CivilHour(kYearMax, 12, 31, 23),
absl::CivilHour::max());
EXPECT_EQ(absl::CivilMinute(kYearMax, 12, 31, 23, 59),
absl::CivilMinute::max());
EXPECT_EQ(absl::CivilSecond(kYearMax, 12, 31, 23, 59, 59),
absl::CivilSecond::max());
const absl::civil_year_t kYearMin =
std::numeric_limits<absl::civil_year_t>::min();
EXPECT_EQ(absl::CivilYear(kYearMin),
absl::CivilYear::min());
EXPECT_EQ(absl::CivilMonth(kYearMin, 1),
absl::CivilMonth::min());
EXPECT_EQ(absl::CivilDay(kYearMin, 1, 1),
absl::CivilDay::min());
EXPECT_EQ(absl::CivilHour(kYearMin, 1, 1, 0),
absl::CivilHour::min());
EXPECT_EQ(absl::CivilMinute(kYearMin, 1, 1, 0, 0),
absl::CivilMinute::min());
EXPECT_EQ(absl::CivilSecond(kYearMin, 1, 1, 0, 0, 0),
absl::CivilSecond::min());
}
TEST(CivilTime, ImplicitCrossAlignment) {
absl::CivilYear year(2015);
absl::CivilMonth month = year;
absl::CivilDay day = month;
absl::CivilHour hour = day;
absl::CivilMinute minute = hour;
absl::CivilSecond second = minute;
second = year;
EXPECT_EQ(second, year);
second = month;
EXPECT_EQ(second, month);
second = day;
EXPECT_EQ(second, day);
second = hour;
EXPECT_EQ(second, hour);
second = minute;
EXPECT_EQ(second, minute);
minute = year;
EXPECT_EQ(minute, year);
minute = month;
EXPECT_EQ(minute, month);
minute = day;
EXPECT_EQ(minute, day);
minute = hour;
EXPECT_EQ(minute, hour);
hour = year;
EXPECT_EQ(hour, year);
hour = month;
EXPECT_EQ(hour, month);
hour = day;
EXPECT_EQ(hour, day);
day = year;
EXPECT_EQ(day, year);
day = month;
EXPECT_EQ(day, month);
month = year;
EXPECT_EQ(month, year);
// Ensures unsafe conversions are not allowed.
EXPECT_FALSE(
(std::is_convertible<absl::CivilSecond, absl::CivilMinute>::value));
EXPECT_FALSE(
(std::is_convertible<absl::CivilSecond, absl::CivilHour>::value));
EXPECT_FALSE(
(std::is_convertible<absl::CivilSecond, absl::CivilDay>::value));
EXPECT_FALSE(
(std::is_convertible<absl::CivilSecond, absl::CivilMonth>::value));
EXPECT_FALSE(
(std::is_convertible<absl::CivilSecond, absl::CivilYear>::value));
EXPECT_FALSE(
(std::is_convertible<absl::CivilMinute, absl::CivilHour>::value));
EXPECT_FALSE(
(std::is_convertible<absl::CivilMinute, absl::CivilDay>::value));
EXPECT_FALSE(
(std::is_convertible<absl::CivilMinute, absl::CivilMonth>::value));
EXPECT_FALSE(
(std::is_convertible<absl::CivilMinute, absl::CivilYear>::value));
EXPECT_FALSE(
(std::is_convertible<absl::CivilHour, absl::CivilDay>::value));
EXPECT_FALSE(
(std::is_convertible<absl::CivilHour, absl::CivilMonth>::value));
EXPECT_FALSE(
(std::is_convertible<absl::CivilHour, absl::CivilYear>::value));
EXPECT_FALSE(
(std::is_convertible<absl::CivilDay, absl::CivilMonth>::value));
EXPECT_FALSE(
(std::is_convertible<absl::CivilDay, absl::CivilYear>::value));
EXPECT_FALSE(
(std::is_convertible<absl::CivilMonth, absl::CivilYear>::value));
}
TEST(CivilTime, ExplicitCrossAlignment) {
//
// Assign from smaller units -> larger units
//
absl::CivilSecond second(2015, 1, 2, 3, 4, 5);
EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(second));
absl::CivilMinute minute(second);
EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(minute));
absl::CivilHour hour(minute);
EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hour));
absl::CivilDay day(hour);
EXPECT_EQ("2015-01-02", absl::FormatCivilTime(day));
absl::CivilMonth month(day);
EXPECT_EQ("2015-01", absl::FormatCivilTime(month));
absl::CivilYear year(month);
EXPECT_EQ("2015", absl::FormatCivilTime(year));
//
// Now assign from larger units -> smaller units
//
month = absl::CivilMonth(year);
EXPECT_EQ("2015-01", absl::FormatCivilTime(month));
day = absl::CivilDay(month);
EXPECT_EQ("2015-01-01", absl::FormatCivilTime(day));
hour = absl::CivilHour(day);
EXPECT_EQ("2015-01-01T00", absl::FormatCivilTime(hour));
minute = absl::CivilMinute(hour);
EXPECT_EQ("2015-01-01T00:00", absl::FormatCivilTime(minute));
second = absl::CivilSecond(minute);
EXPECT_EQ("2015-01-01T00:00:00", absl::FormatCivilTime(second));
}
// Metafunction to test whether difference is allowed between two types.
template <typename T1, typename T2>
struct HasDiff {
template <typename U1, typename U2>
static std::false_type test(...);
template <typename U1, typename U2>
static std::true_type test(decltype(std::declval<U1>() - std::declval<U2>()));
static constexpr bool value = decltype(test<T1, T2>(0))::value;
};
TEST(CivilTime, DisallowCrossAlignedDifference) {
// Difference is allowed between types with the same alignment.
static_assert(HasDiff<absl::CivilSecond, absl::CivilSecond>::value, "");
static_assert(HasDiff<absl::CivilMinute, absl::CivilMinute>::value, "");
static_assert(HasDiff<absl::CivilHour, absl::CivilHour>::value, "");
static_assert(HasDiff<absl::CivilDay, absl::CivilDay>::value, "");
static_assert(HasDiff<absl::CivilMonth, absl::CivilMonth>::value, "");
static_assert(HasDiff<absl::CivilYear, absl::CivilYear>::value, "");
// Difference is disallowed between types with different alignments.
static_assert(!HasDiff<absl::CivilSecond, absl::CivilMinute>::value, "");
static_assert(!HasDiff<absl::CivilSecond, absl::CivilHour>::value, "");
static_assert(!HasDiff<absl::CivilSecond, absl::CivilDay>::value, "");
static_assert(!HasDiff<absl::CivilSecond, absl::CivilMonth>::value, "");
static_assert(!HasDiff<absl::CivilSecond, absl::CivilYear>::value, "");
static_assert(!HasDiff<absl::CivilMinute, absl::CivilHour>::value, "");
static_assert(!HasDiff<absl::CivilMinute, absl::CivilDay>::value, "");
static_assert(!HasDiff<absl::CivilMinute, absl::CivilMonth>::value, "");
static_assert(!HasDiff<absl::CivilMinute, absl::CivilYear>::value, "");
static_assert(!HasDiff<absl::CivilHour, absl::CivilDay>::value, "");
static_assert(!HasDiff<absl::CivilHour, absl::CivilMonth>::value, "");
static_assert(!HasDiff<absl::CivilHour, absl::CivilYear>::value, "");
static_assert(!HasDiff<absl::CivilDay, absl::CivilMonth>::value, "");
static_assert(!HasDiff<absl::CivilDay, absl::CivilYear>::value, "");
static_assert(!HasDiff<absl::CivilMonth, absl::CivilYear>::value, "");
}
TEST(CivilTime, ValueSemantics) {
const absl::CivilHour a(2015, 1, 2, 3);
const absl::CivilHour b = a;
const absl::CivilHour c(b);
absl::CivilHour d;
d = c;
EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(d));
}
TEST(CivilTime, Relational) {
// Tests that the alignment unit is ignored in comparison.
const absl::CivilYear year(2014);
const absl::CivilMonth month(year);
EXPECT_EQ(year, month);
#define TEST_RELATIONAL(OLDER, YOUNGER) \
do { \
EXPECT_FALSE(OLDER < OLDER); \
EXPECT_FALSE(OLDER > OLDER); \
EXPECT_TRUE(OLDER >= OLDER); \
EXPECT_TRUE(OLDER <= OLDER); \
EXPECT_FALSE(YOUNGER < YOUNGER); \
EXPECT_FALSE(YOUNGER > YOUNGER); \
EXPECT_TRUE(YOUNGER >= YOUNGER); \
EXPECT_TRUE(YOUNGER <= YOUNGER); \
EXPECT_EQ(OLDER, OLDER); \
EXPECT_NE(OLDER, YOUNGER); \
EXPECT_LT(OLDER, YOUNGER); \
EXPECT_LE(OLDER, YOUNGER); \
EXPECT_GT(YOUNGER, OLDER); \
EXPECT_GE(YOUNGER, OLDER); \
} while (0)
// Alignment is ignored in comparison (verified above), so CivilSecond is
// used to test comparison in all field positions.
TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 0, 0, 0),
absl::CivilSecond(2015, 1, 1, 0, 0, 0));
TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 0, 0, 0),
absl::CivilSecond(2014, 2, 1, 0, 0, 0));
TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 0, 0, 0),
absl::CivilSecond(2014, 1, 2, 0, 0, 0));
TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 0, 0, 0),
absl::CivilSecond(2014, 1, 1, 1, 0, 0));
TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 1, 0, 0),
absl::CivilSecond(2014, 1, 1, 1, 1, 0));
TEST_RELATIONAL(absl::CivilSecond(2014, 1, 1, 1, 1, 0),
absl::CivilSecond(2014, 1, 1, 1, 1, 1));
// Tests the relational operators of two different civil-time types.
TEST_RELATIONAL(absl::CivilDay(2014, 1, 1),
absl::CivilMinute(2014, 1, 1, 1, 1));
TEST_RELATIONAL(absl::CivilDay(2014, 1, 1),
absl::CivilMonth(2014, 2));
#undef TEST_RELATIONAL
}
TEST(CivilTime, Arithmetic) {
absl::CivilSecond second(2015, 1, 2, 3, 4, 5);
EXPECT_EQ("2015-01-02T03:04:06", absl::FormatCivilTime(second += 1));
EXPECT_EQ("2015-01-02T03:04:07", absl::FormatCivilTime(second + 1));
EXPECT_EQ("2015-01-02T03:04:08", absl::FormatCivilTime(2 + second));
EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(second - 1));
EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(second -= 1));
EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(second++));
EXPECT_EQ("2015-01-02T03:04:07", absl::FormatCivilTime(++second));
EXPECT_EQ("2015-01-02T03:04:07", absl::FormatCivilTime(second--));
EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(--second));
absl::CivilMinute minute(2015, 1, 2, 3, 4);
EXPECT_EQ("2015-01-02T03:05", absl::FormatCivilTime(minute += 1));
EXPECT_EQ("2015-01-02T03:06", absl::FormatCivilTime(minute + 1));
EXPECT_EQ("2015-01-02T03:07", absl::FormatCivilTime(2 + minute));
EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(minute - 1));
EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(minute -= 1));
EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(minute++));
EXPECT_EQ("2015-01-02T03:06", absl::FormatCivilTime(++minute));
EXPECT_EQ("2015-01-02T03:06", absl::FormatCivilTime(minute--));
EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(--minute));
absl::CivilHour hour(2015, 1, 2, 3);
EXPECT_EQ("2015-01-02T04", absl::FormatCivilTime(hour += 1));
EXPECT_EQ("2015-01-02T05", absl::FormatCivilTime(hour + 1));
EXPECT_EQ("2015-01-02T06", absl::FormatCivilTime(2 + hour));
EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hour - 1));
EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hour -= 1));
EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hour++));
EXPECT_EQ("2015-01-02T05", absl::FormatCivilTime(++hour));
EXPECT_EQ("2015-01-02T05", absl::FormatCivilTime(hour--));
EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(--hour));
absl::CivilDay day(2015, 1, 2);
EXPECT_EQ("2015-01-03", absl::FormatCivilTime(day += 1));
EXPECT_EQ("2015-01-04", absl::FormatCivilTime(day + 1));
EXPECT_EQ("2015-01-05", absl::FormatCivilTime(2 + day));
EXPECT_EQ("2015-01-02", absl::FormatCivilTime(day - 1));
EXPECT_EQ("2015-01-02", absl::FormatCivilTime(day -= 1));
EXPECT_EQ("2015-01-02", absl::FormatCivilTime(day++));
EXPECT_EQ("2015-01-04", absl::FormatCivilTime(++day));
EXPECT_EQ("2015-01-04", absl::FormatCivilTime(day--));
EXPECT_EQ("2015-01-02", absl::FormatCivilTime(--day));
absl::CivilMonth month(2015, 1);
EXPECT_EQ("2015-02", absl::FormatCivilTime(month += 1));
EXPECT_EQ("2015-03", absl::FormatCivilTime(month + 1));
EXPECT_EQ("2015-04", absl::FormatCivilTime(2 + month));
EXPECT_EQ("2015-01", absl::FormatCivilTime(month - 1));
EXPECT_EQ("2015-01", absl::FormatCivilTime(month -= 1));
EXPECT_EQ("2015-01", absl::FormatCivilTime(month++));
EXPECT_EQ("2015-03", absl::FormatCivilTime(++month));
EXPECT_EQ("2015-03", absl::FormatCivilTime(month--));
EXPECT_EQ("2015-01", absl::FormatCivilTime(--month));
absl::CivilYear year(2015);
EXPECT_EQ("2016", absl::FormatCivilTime(year += 1));
EXPECT_EQ("2017", absl::FormatCivilTime(year + 1));
EXPECT_EQ("2018", absl::FormatCivilTime(2 + year));
EXPECT_EQ("2015", absl::FormatCivilTime(year - 1));
EXPECT_EQ("2015", absl::FormatCivilTime(year -= 1));
EXPECT_EQ("2015", absl::FormatCivilTime(year++));
EXPECT_EQ("2017", absl::FormatCivilTime(++year));
EXPECT_EQ("2017", absl::FormatCivilTime(year--));
EXPECT_EQ("2015", absl::FormatCivilTime(--year));
}
TEST(CivilTime, ArithmeticLimits) {
const int kIntMax = std::numeric_limits<int>::max();
const int kIntMin = std::numeric_limits<int>::min();
absl::CivilSecond second(1970, 1, 1, 0, 0, 0);
second += kIntMax;
EXPECT_EQ("2038-01-19T03:14:07", absl::FormatCivilTime(second));
second -= kIntMax;
EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(second));
second += kIntMin;
EXPECT_EQ("1901-12-13T20:45:52", absl::FormatCivilTime(second));
second -= kIntMin;
EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(second));
absl::CivilMinute minute(1970, 1, 1, 0, 0);
minute += kIntMax;
EXPECT_EQ("6053-01-23T02:07", absl::FormatCivilTime(minute));
minute -= kIntMax;
EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(minute));
minute += kIntMin;
EXPECT_EQ("-2114-12-08T21:52", absl::FormatCivilTime(minute));
minute -= kIntMin;
EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(minute));
absl::CivilHour hour(1970, 1, 1, 0);
hour += kIntMax;
EXPECT_EQ("246953-10-09T07", absl::FormatCivilTime(hour));
hour -= kIntMax;
EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hour));
hour += kIntMin;
EXPECT_EQ("-243014-03-24T16", absl::FormatCivilTime(hour));
hour -= kIntMin;
EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hour));
absl::CivilDay day(1970, 1, 1);
day += kIntMax;
EXPECT_EQ("5881580-07-11", absl::FormatCivilTime(day));
day -= kIntMax;
EXPECT_EQ("1970-01-01", absl::FormatCivilTime(day));
day += kIntMin;
EXPECT_EQ("-5877641-06-23", absl::FormatCivilTime(day));
day -= kIntMin;
EXPECT_EQ("1970-01-01", absl::FormatCivilTime(day));
absl::CivilMonth month(1970, 1);
month += kIntMax;
EXPECT_EQ("178958940-08", absl::FormatCivilTime(month));
month -= kIntMax;
EXPECT_EQ("1970-01", absl::FormatCivilTime(month));
month += kIntMin;
EXPECT_EQ("-178955001-05", absl::FormatCivilTime(month));
month -= kIntMin;
EXPECT_EQ("1970-01", absl::FormatCivilTime(month));
absl::CivilYear year(0);
year += kIntMax;
EXPECT_EQ("2147483647", absl::FormatCivilTime(year));
year -= kIntMax;
EXPECT_EQ("0", absl::FormatCivilTime(year));
year += kIntMin;
EXPECT_EQ("-2147483648", absl::FormatCivilTime(year));
year -= kIntMin;
EXPECT_EQ("0", absl::FormatCivilTime(year));
}
TEST(CivilTime, Difference) {
absl::CivilSecond second(2015, 1, 2, 3, 4, 5);
EXPECT_EQ(0, second - second);
EXPECT_EQ(10, (second + 10) - second);
EXPECT_EQ(-10, (second - 10) - second);
absl::CivilMinute minute(2015, 1, 2, 3, 4);
EXPECT_EQ(0, minute - minute);
EXPECT_EQ(10, (minute + 10) - minute);
EXPECT_EQ(-10, (minute - 10) - minute);
absl::CivilHour hour(2015, 1, 2, 3);
EXPECT_EQ(0, hour - hour);
EXPECT_EQ(10, (hour + 10) - hour);
EXPECT_EQ(-10, (hour - 10) - hour);
absl::CivilDay day(2015, 1, 2);
EXPECT_EQ(0, day - day);
EXPECT_EQ(10, (day + 10) - day);
EXPECT_EQ(-10, (day - 10) - day);
absl::CivilMonth month(2015, 1);
EXPECT_EQ(0, month - month);
EXPECT_EQ(10, (month + 10) - month);
EXPECT_EQ(-10, (month - 10) - month);
absl::CivilYear year(2015);
EXPECT_EQ(0, year - year);
EXPECT_EQ(10, (year + 10) - year);
EXPECT_EQ(-10, (year - 10) - year);
}
TEST(CivilTime, DifferenceLimits) {
const absl::civil_diff_t kDiffMax =
std::numeric_limits<absl::civil_diff_t>::max();
const absl::civil_diff_t kDiffMin =
std::numeric_limits<absl::civil_diff_t>::min();
// Check day arithmetic at the end of the year range.
const absl::CivilDay max_day(kDiffMax, 12, 31);
EXPECT_EQ(1, max_day - (max_day - 1));
EXPECT_EQ(-1, (max_day - 1) - max_day);
// Check day arithmetic at the start of the year range.
const absl::CivilDay min_day(kDiffMin, 1, 1);
EXPECT_EQ(1, (min_day + 1) - min_day);
EXPECT_EQ(-1, min_day - (min_day + 1));
// Check the limits of the return value.
const absl::CivilDay d1(1970, 1, 1);
const absl::CivilDay d2(25252734927768524, 7, 27);
EXPECT_EQ(kDiffMax, d2 - d1);
EXPECT_EQ(kDiffMin, d1 - (d2 + 1));
}
TEST(CivilTime, Properties) {
absl::CivilSecond ss(2015, 2, 3, 4, 5, 6);
EXPECT_EQ(2015, ss.year());
EXPECT_EQ(2, ss.month());
EXPECT_EQ(3, ss.day());
EXPECT_EQ(4, ss.hour());
EXPECT_EQ(5, ss.minute());
EXPECT_EQ(6, ss.second());
EXPECT_EQ(absl::Weekday::tuesday, absl::GetWeekday(ss));
EXPECT_EQ(34, absl::GetYearDay(ss));
absl::CivilMinute mm(2015, 2, 3, 4, 5, 6);
EXPECT_EQ(2015, mm.year());
EXPECT_EQ(2, mm.month());
EXPECT_EQ(3, mm.day());
EXPECT_EQ(4, mm.hour());
EXPECT_EQ(5, mm.minute());
EXPECT_EQ(0, mm.second());
EXPECT_EQ(absl::Weekday::tuesday, absl::GetWeekday(mm));
EXPECT_EQ(34, absl::GetYearDay(mm));
absl::CivilHour hh(2015, 2, 3, 4, 5, 6);
EXPECT_EQ(2015, hh.year());
EXPECT_EQ(2, hh.month());
EXPECT_EQ(3, hh.day());
EXPECT_EQ(4, hh.hour());
EXPECT_EQ(0, hh.minute());
EXPECT_EQ(0, hh.second());
EXPECT_EQ(absl::Weekday::tuesday, absl::GetWeekday(hh));
EXPECT_EQ(34, absl::GetYearDay(hh));
absl::CivilDay d(2015, 2, 3, 4, 5, 6);
EXPECT_EQ(2015, d.year());
EXPECT_EQ(2, d.month());
EXPECT_EQ(3, d.day());
EXPECT_EQ(0, d.hour());
EXPECT_EQ(0, d.minute());
EXPECT_EQ(0, d.second());
EXPECT_EQ(absl::Weekday::tuesday, absl::GetWeekday(d));
EXPECT_EQ(34, absl::GetYearDay(d));
absl::CivilMonth m(2015, 2, 3, 4, 5, 6);
EXPECT_EQ(2015, m.year());
EXPECT_EQ(2, m.month());
EXPECT_EQ(1, m.day());
EXPECT_EQ(0, m.hour());
EXPECT_EQ(0, m.minute());
EXPECT_EQ(0, m.second());
EXPECT_EQ(absl::Weekday::sunday, absl::GetWeekday(m));
EXPECT_EQ(32, absl::GetYearDay(m));
absl::CivilYear y(2015, 2, 3, 4, 5, 6);
EXPECT_EQ(2015, y.year());
EXPECT_EQ(1, y.month());
EXPECT_EQ(1, y.day());
EXPECT_EQ(0, y.hour());
EXPECT_EQ(0, y.minute());
EXPECT_EQ(0, y.second());
EXPECT_EQ(absl::Weekday::thursday, absl::GetWeekday(y));
EXPECT_EQ(1, absl::GetYearDay(y));
}
TEST(CivilTime, Format) {
absl::CivilSecond ss;
EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(ss));
absl::CivilMinute mm;
EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(mm));
absl::CivilHour hh;
EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hh));
absl::CivilDay d;
EXPECT_EQ("1970-01-01", absl::FormatCivilTime(d));
absl::CivilMonth m;
EXPECT_EQ("1970-01", absl::FormatCivilTime(m));
absl::CivilYear y;
EXPECT_EQ("1970", absl::FormatCivilTime(y));
}
TEST(CivilTime, Parse) {
absl::CivilSecond ss;
absl::CivilMinute mm;
absl::CivilHour hh;
absl::CivilDay d;
absl::CivilMonth m;
absl::CivilYear y;
// CivilSecond OK; others fail
EXPECT_TRUE(absl::ParseCivilTime("2015-01-02T03:04:05", &ss));
EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(ss));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04:05", &mm));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04:05", &hh));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04:05", &d));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04:05", &m));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04:05", &y));
// CivilMinute OK; others fail
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04", &ss));
EXPECT_TRUE(absl::ParseCivilTime("2015-01-02T03:04", &mm));
EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(mm));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04", &hh));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04", &d));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04", &m));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03:04", &y));
// CivilHour OK; others fail
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03", &ss));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03", &mm));
EXPECT_TRUE(absl::ParseCivilTime("2015-01-02T03", &hh));
EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hh));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03", &d));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03", &m));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02T03", &y));
// CivilDay OK; others fail
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02", &ss));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02", &mm));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02", &hh));
EXPECT_TRUE(absl::ParseCivilTime("2015-01-02", &d));
EXPECT_EQ("2015-01-02", absl::FormatCivilTime(d));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02", &m));
EXPECT_FALSE(absl::ParseCivilTime("2015-01-02", &y));
// CivilMonth OK; others fail
EXPECT_FALSE(absl::ParseCivilTime("2015-01", &ss));
EXPECT_FALSE(absl::ParseCivilTime("2015-01", &mm));
EXPECT_FALSE(absl::ParseCivilTime("2015-01", &hh));
EXPECT_FALSE(absl::ParseCivilTime("2015-01", &d));
EXPECT_TRUE(absl::ParseCivilTime("2015-01", &m));
EXPECT_EQ("2015-01", absl::FormatCivilTime(m));
EXPECT_FALSE(absl::ParseCivilTime("2015-01", &y));
// CivilYear OK; others fail
EXPECT_FALSE(absl::ParseCivilTime("2015", &ss));
EXPECT_FALSE(absl::ParseCivilTime("2015", &mm));
EXPECT_FALSE(absl::ParseCivilTime("2015", &hh));
EXPECT_FALSE(absl::ParseCivilTime("2015", &d));
EXPECT_FALSE(absl::ParseCivilTime("2015", &m));
EXPECT_TRUE(absl::ParseCivilTime("2015", &y));
EXPECT_EQ("2015", absl::FormatCivilTime(y));
}
TEST(CivilTime, FormatAndParseLenient) {
absl::CivilSecond ss;
EXPECT_EQ("1970-01-01T00:00:00", absl::FormatCivilTime(ss));
absl::CivilMinute mm;
EXPECT_EQ("1970-01-01T00:00", absl::FormatCivilTime(mm));
absl::CivilHour hh;
EXPECT_EQ("1970-01-01T00", absl::FormatCivilTime(hh));
absl::CivilDay d;
EXPECT_EQ("1970-01-01", absl::FormatCivilTime(d));
absl::CivilMonth m;
EXPECT_EQ("1970-01", absl::FormatCivilTime(m));
absl::CivilYear y;
EXPECT_EQ("1970", absl::FormatCivilTime(y));
EXPECT_TRUE(absl::ParseLenientCivilTime("2015-01-02T03:04:05", &ss));
EXPECT_EQ("2015-01-02T03:04:05", absl::FormatCivilTime(ss));
EXPECT_TRUE(absl::ParseLenientCivilTime("2015-01-02T03:04:05", &mm));
EXPECT_EQ("2015-01-02T03:04", absl::FormatCivilTime(mm));
EXPECT_TRUE(absl::ParseLenientCivilTime("2015-01-02T03:04:05", &hh));
EXPECT_EQ("2015-01-02T03", absl::FormatCivilTime(hh));
EXPECT_TRUE(absl::ParseLenientCivilTime("2015-01-02T03:04:05", &d));
EXPECT_EQ("2015-01-02", absl::FormatCivilTime(d));
EXPECT_TRUE(absl::ParseLenientCivilTime("2015-01-02T03:04:05", &m));
EXPECT_EQ("2015-01", absl::FormatCivilTime(m));
EXPECT_TRUE(absl::ParseLenientCivilTime("2015-01-02T03:04:05", &y));
EXPECT_EQ("2015", absl::FormatCivilTime(y));
}
TEST(CivilTime, ParseEdgeCases) {
absl::CivilSecond ss;
EXPECT_TRUE(
absl::ParseLenientCivilTime("9223372036854775807-12-31T23:59:59", &ss));
EXPECT_EQ("9223372036854775807-12-31T23:59:59", absl::FormatCivilTime(ss));
EXPECT_TRUE(
absl::ParseLenientCivilTime("-9223372036854775808-01-01T00:00:00", &ss));
EXPECT_EQ("-9223372036854775808-01-01T00:00:00", absl::FormatCivilTime(ss));
absl::CivilMinute mm;
EXPECT_TRUE(
absl::ParseLenientCivilTime("9223372036854775807-12-31T23:59", &mm));
EXPECT_EQ("9223372036854775807-12-31T23:59", absl::FormatCivilTime(mm));
EXPECT_TRUE(
absl::ParseLenientCivilTime("-9223372036854775808-01-01T00:00", &mm));
EXPECT_EQ("-9223372036854775808-01-01T00:00", absl::FormatCivilTime(mm));
absl::CivilHour hh;
EXPECT_TRUE(
absl::ParseLenientCivilTime("9223372036854775807-12-31T23", &hh));
EXPECT_EQ("9223372036854775807-12-31T23", absl::FormatCivilTime(hh));
EXPECT_TRUE(
absl::ParseLenientCivilTime("-9223372036854775808-01-01T00", &hh));
EXPECT_EQ("-9223372036854775808-01-01T00", absl::FormatCivilTime(hh));
absl::CivilDay d;
EXPECT_TRUE(absl::ParseLenientCivilTime("9223372036854775807-12-31", &d));
EXPECT_EQ("9223372036854775807-12-31", absl::FormatCivilTime(d));
EXPECT_TRUE(absl::ParseLenientCivilTime("-9223372036854775808-01-01", &d));
EXPECT_EQ("-9223372036854775808-01-01", absl::FormatCivilTime(d));
absl::CivilMonth m;
EXPECT_TRUE(absl::ParseLenientCivilTime("9223372036854775807-12", &m));
EXPECT_EQ("9223372036854775807-12", absl::FormatCivilTime(m));
EXPECT_TRUE(absl::ParseLenientCivilTime("-9223372036854775808-01", &m));
EXPECT_EQ("-9223372036854775808-01", absl::FormatCivilTime(m));
absl::CivilYear y;
EXPECT_TRUE(absl::ParseLenientCivilTime("9223372036854775807", &y));
EXPECT_EQ("9223372036854775807", absl::FormatCivilTime(y));
EXPECT_TRUE(absl::ParseLenientCivilTime("-9223372036854775808", &y));
EXPECT_EQ("-9223372036854775808", absl::FormatCivilTime(y));
// Tests some valid, but interesting, cases
EXPECT_TRUE(absl::ParseLenientCivilTime("0", &ss)) << ss;
EXPECT_EQ(absl::CivilYear(0), ss);
EXPECT_TRUE(absl::ParseLenientCivilTime("0-1", &ss)) << ss;
EXPECT_EQ(absl::CivilMonth(0, 1), ss);
EXPECT_TRUE(absl::ParseLenientCivilTime(" 2015 ", &ss)) << ss;
EXPECT_EQ(absl::CivilYear(2015), ss);
EXPECT_TRUE(absl::ParseLenientCivilTime(" 2015-6 ", &ss)) << ss;
EXPECT_EQ(absl::CivilMonth(2015, 6), ss);
EXPECT_TRUE(absl::ParseLenientCivilTime("2015-6-7", &ss)) << ss;
EXPECT_EQ(absl::CivilDay(2015, 6, 7), ss);
EXPECT_TRUE(absl::ParseLenientCivilTime(" 2015-6-7 ", &ss)) << ss;
EXPECT_EQ(absl::CivilDay(2015, 6, 7), ss);
EXPECT_TRUE(absl::ParseLenientCivilTime("2015-06-07T10:11:12 ", &ss)) << ss;
EXPECT_EQ(absl::CivilSecond(2015, 6, 7, 10, 11, 12), ss);
EXPECT_TRUE(absl::ParseLenientCivilTime(" 2015-06-07T10:11:12 ", &ss)) << ss;
EXPECT_EQ(absl::CivilSecond(2015, 6, 7, 10, 11, 12), ss);
EXPECT_TRUE(absl::ParseLenientCivilTime("-01-01", &ss)) << ss;
EXPECT_EQ(absl::CivilMonth(-1, 1), ss);
// Tests some invalid cases
EXPECT_FALSE(absl::ParseLenientCivilTime("01-01-2015", &ss)) << ss;
EXPECT_FALSE(absl::ParseLenientCivilTime("2015-", &ss)) << ss;
EXPECT_FALSE(absl::ParseLenientCivilTime("0xff-01", &ss)) << ss;
EXPECT_FALSE(absl::ParseLenientCivilTime("2015-02-30T04:05:06", &ss)) << ss;
EXPECT_FALSE(absl::ParseLenientCivilTime("2015-02-03T04:05:96", &ss)) << ss;
EXPECT_FALSE(absl::ParseLenientCivilTime("X2015-02-03T04:05:06", &ss)) << ss;
EXPECT_FALSE(absl::ParseLenientCivilTime("2015-02-03T04:05:003", &ss)) << ss;
EXPECT_FALSE(absl::ParseLenientCivilTime("2015 -02-03T04:05:06", &ss)) << ss;
EXPECT_FALSE(absl::ParseLenientCivilTime("2015-02-03-04:05:06", &ss)) << ss;
EXPECT_FALSE(absl::ParseLenientCivilTime("2015:02:03T04-05-06", &ss)) << ss;
EXPECT_FALSE(absl::ParseLenientCivilTime("9223372036854775808", &y)) << y;
}
TEST(CivilTime, OutputStream) {
absl::CivilSecond cs(2016, 2, 3, 4, 5, 6);
{
std::stringstream ss;
ss << std::left << std::setfill('.');
ss << std::setw(3) << 'X';
ss << std::setw(21) << absl::CivilYear(cs);
ss << std::setw(3) << 'X';
EXPECT_EQ("X..2016.................X..", ss.str());
}
{
std::stringstream ss;
ss << std::left << std::setfill('.');
ss << std::setw(3) << 'X';
ss << std::setw(21) << absl::CivilMonth(cs);
ss << std::setw(3) << 'X';
EXPECT_EQ("X..2016-02..............X..", ss.str());
}
{
std::stringstream ss;
ss << std::left << std::setfill('.');
ss << std::setw(3) << 'X';
ss << std::setw(21) << absl::CivilDay(cs);
ss << std::setw(3) << 'X';
EXPECT_EQ("X..2016-02-03...........X..", ss.str());
}
{
std::stringstream ss;
ss << std::left << std::setfill('.');
ss << std::setw(3) << 'X';
ss << std::setw(21) << absl::CivilHour(cs);
ss << std::setw(3) << 'X';
EXPECT_EQ("X..2016-02-03T04........X..", ss.str());
}
{
std::stringstream ss;
ss << std::left << std::setfill('.');
ss << std::setw(3) << 'X';
ss << std::setw(21) << absl::CivilMinute(cs);
ss << std::setw(3) << 'X';
EXPECT_EQ("X..2016-02-03T04:05.....X..", ss.str());
}
{
std::stringstream ss;
ss << std::left << std::setfill('.');
ss << std::setw(3) << 'X';
ss << std::setw(21) << absl::CivilSecond(cs);
ss << std::setw(3) << 'X';
EXPECT_EQ("X..2016-02-03T04:05:06..X..", ss.str());
}
{
std::stringstream ss;
ss << std::left << std::setfill('.');
ss << std::setw(3) << 'X';
ss << std::setw(21) << absl::Weekday::wednesday;
ss << std::setw(3) << 'X';
EXPECT_EQ("X..Wednesday............X..", ss.str());
}
}
TEST(CivilTime, Weekday) {
absl::CivilDay d(1970, 1, 1);
EXPECT_EQ(absl::Weekday::thursday, absl::GetWeekday(d)) << d;
// We used to get this wrong for years < -30.
d = absl::CivilDay(-31, 12, 24);
EXPECT_EQ(absl::Weekday::wednesday, absl::GetWeekday(d)) << d;
}
TEST(CivilTime, NextPrevWeekday) {
// Jan 1, 1970 was a Thursday.
const absl::CivilDay thursday(1970, 1, 1);
// Thursday -> Thursday
absl::CivilDay d = absl::NextWeekday(thursday, absl::Weekday::thursday);
EXPECT_EQ(7, d - thursday) << d;
EXPECT_EQ(d - 14, absl::PrevWeekday(thursday, absl::Weekday::thursday));
// Thursday -> Friday
d = absl::NextWeekday(thursday, absl::Weekday::friday);
EXPECT_EQ(1, d - thursday) << d;
EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::friday));
// Thursday -> Saturday
d = absl::NextWeekday(thursday, absl::Weekday::saturday);
EXPECT_EQ(2, d - thursday) << d;
EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::saturday));
// Thursday -> Sunday
d = absl::NextWeekday(thursday, absl::Weekday::sunday);
EXPECT_EQ(3, d - thursday) << d;
EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::sunday));
// Thursday -> Monday
d = absl::NextWeekday(thursday, absl::Weekday::monday);
EXPECT_EQ(4, d - thursday) << d;
EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::monday));
// Thursday -> Tuesday
d = absl::NextWeekday(thursday, absl::Weekday::tuesday);
EXPECT_EQ(5, d - thursday) << d;
EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::tuesday));
// Thursday -> Wednesday
d = absl::NextWeekday(thursday, absl::Weekday::wednesday);
EXPECT_EQ(6, d - thursday) << d;
EXPECT_EQ(d - 7, absl::PrevWeekday(thursday, absl::Weekday::wednesday));
}
// NOTE: Run this with --copt=-ftrapv to detect overflow problems.
TEST(CivilTime, DifferenceWithHugeYear) {
absl::CivilDay d1(9223372036854775807, 1, 1);
absl::CivilDay d2(9223372036854775807, 12, 31);
EXPECT_EQ(364, d2 - d1);
d1 = absl::CivilDay(-9223372036854775807 - 1, 1, 1);
d2 = absl::CivilDay(-9223372036854775807 - 1, 12, 31);
EXPECT_EQ(365, d2 - d1);
// Check the limits of the return value at the end of the year range.
d1 = absl::CivilDay(9223372036854775807, 1, 1);
d2 = absl::CivilDay(9198119301927009252, 6, 6);
EXPECT_EQ(9223372036854775807, d1 - d2);
d2 = d2 - 1;
EXPECT_EQ(-9223372036854775807 - 1, d2 - d1);
// Check the limits of the return value at the start of the year range.
d1 = absl::CivilDay(-9223372036854775807 - 1, 1, 1);
d2 = absl::CivilDay(-9198119301927009254, 7, 28);
EXPECT_EQ(9223372036854775807, d2 - d1);